Pipe cleaning machine



FIG. 1 is a right side, top perspective view of my new design for a pipe cleaning machine;

FIG. 2 is a left side, top perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for a pipe cleaning machine, as shown and described. 